So my car shakes at 60-75mph. Even if the steering wheel doesnt shake I can feel it in the car. I know its not my wheels and tires as It would shake with my stock wheels and tires on before and after they were balanced. When I put m new wheels on I could feel it even more. Im really not sure what to do because I know if I take it to Infinti they are just going to rebalance the tires and tell me its fine. Any clues what it could be and if anyone else has had this trouble? I know there was a post a long time ago where someone had this trouble but he ended up trading in the car due to not being able to fix his. I dont want to do that as I love my car.

because I know if I take it to Infinti they are just going to rebalance the tires and tell me its fine.

thanks

I actually still have my vibration problem. Even bought new tires thinking that was the issue..nope. My steering wheel shakes sometimes..but on some roads it's fine. I can tell you exactly when it's going to shake at a certain point on a highway i always travel. I can get out of it at 80-85..but then i feel it in my seat a good amount but not steering wheel.

All Infiniti does is oh pay $150 for wheel balancing and then we will look into it..they do it and drive it and say it's perfect. Then i got in it and nope..it was even worse. So Infiniti is useless to go to. I went to a independent mechanic. He couldn't find anything wrong with the car. So i have a phantom vibration that i don't know will ever be fixed

I think mine might be the wheels. But i don't have a different set of wheels and tires to try

What type of tires do you have? Uneven wear? Also, have you looked at the diff fluid or trans fluid for any signs of wear? Only way to check those

I love my car as well and refuse to sell it until at least the 4 yr mark. But a phantom vibration in the seats and wheel is very frustrating..

Just put brand new wheels and tires on it Saturday. Just as bad as my stock ones when it comes to the vibration. It is really annoying because its only at highway speeds and I drive highway every day.

Im with you I really dont want to get rid of my car but this is crazy

if this happens on a certain stretch of highway then its the road, also whats the mileage on your car, does it feel like the front end is loose or the rear, have you tried getting under the car and hood and seeing if there any loose bolts or look at the bushing to see if they are worn out

So, i may have a theory as i too have the same problem that only happens after going 80+ mph. When i traded my stock exhaust with someone i gave them the tranny balancer (at least thats what i think its called) since the shop we went to stated there was no reason to have it as it doesnt do much and wont fit with after market exhausts. I never really get a chance to go over 60 mph as i do more city driving than highway until recently. When i get to 80 i start getting a noticeable shake and as i begin to reach 90 it gets progressively worse. Even though i have never realized if it happened when i did have the tranny balancer on, i am starting to believe that the lack of one is causing my shaking.

If you guys could, check under your car and see if you can see literally a chunk of metal bolted to your tranny (should be located in the center of your car just behind where the front wheels are located). I am really curious to see if this is the cause of thie mysterious shake.